Brake shoe



July 19, 1927. 1,636,003

L. E. A BRIE BRAKE SHOE Filed M ay 22. 1926 INVENTOR LUBDYGER E.LABR\ E5 .l FGnS ATTORNEY Patented July 19, 1927.

UNITED STATES PATENT OFFICE.

LUDGER ELIZ LA BRIE, OF SOUTH BEND, INDIANA, ASSIGNOR T BENDIX BRAKECOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BRAKE SHOE.

Application led May 22,

This invention relates to brakes and is illustrated as embodied in aninternal expanding automobile brake. An object of the invention is tosecure great strength in a shoe utilizing inexpensive and readily formedparts by reinforcing an outer cylindrical band forming or carrying thebrake-lining by means of a novel stiffening member, preferably ofchannel section, secured to the inner face of the outer cylindrical partor band. One advantage of this construction is that it permits the useof bands of different widths with the same stiffening parts, to securedifferent widths of brake shoes without unduly mulitplying the number ofparts to be manufactured.

Other features of the invention relate to forming a channel sectionmember, such as the stifi'ening member described above, so that itprojects beyond the end of the shoe to form, a pair of spaced arms, toan improved means of forming extended bearings for pivots for the shoe,and to other novel combinations of parts and desirable particularconstructions which will be apparent from the following description ofone illustrative embodiment shown in the accompanying drawings, inwhich:

Figure 1 is a vertical section through the brake just inside the head ofthe brake drum, and showing the shoes in side elevation;

Figure 2 is a partial section on the line 2-2 of Figure 1 showing themeans for taking the braking torque;

` Figure 3 is a section through one of the end shoes on the line 3 3 ofFigure 1;

Figure 4 is a section through the center shoe on the line 4-4 of Figure1; and

Figure 5 is a partial section on the line 5 5 of Figure 1 showing apivoted connec'tion between two of the shoes. r

The brake selected for illustration in cludes adi-um 10, at the openside of which there may be arranged a backing plate or other suitablesupport 12 and within which are arranged the three shoes 14, 16, and 18of the brake, shoes 14 and 18 preferably being identical andinterchangeable.

Shoe 16 is shown anchored on a pivot 20 carried by backing plate 12 andpassing through a relatively large opening 22 in shoe 14, while shoes 14and 18 are both pivotally connected to shoe 16 by means of pivots 24 and26. The shoe may be applied by means 1926. Serial No. 110,832.

such as a double cam 28 arranged to force shoes 14 and 18 apart againstthe resistance of a. return spring 30, the shoes 14 and 18, particularlythe shoe 18, there-upon forcing the shoe 16 toward the drum against theresistance of an auxiliary return spring 32. lVhen the brake iS notapplied, the spring 32 holds the shoe 16 in an idle position determinedby an eccentric adjustable stop 84 interlocking with a groove in the endof pivot 24 formed by a flange 86. The pivot 26 preferably has arelatively large head 36 shdably engaging the backing plate 12 and, ifdesired, cotter pins 40 may be provided in the ends of the pivot 26 andthe pivot or anchor 20 to prevent axial movement of the shoes.

Each of the end shoes 14 and 18 is formed of acylindrical part or band42, shown-as being a section of hot-rolled stock, to which thebrake-lining 44 is secured and which is reinforced by a stitfening webformed of two sheet metal stampings 46 and 48 secured by welding orriveting back to back and having outer flanges 50 welded or riveted orotherwise secured to the inner face ofy the band 42. Preferably thestampings 46 and 48 are stifl'ened by short flanges 52 at their inneredges, and I prefer to run a flange entirely around the edge of each ofthe stampings so that the flanges 50 and 52 form sections of such acontinuous flange. It will be observed that the stiif'ening web formedby stampings 46 and 48 may be used to form shoes of different widths byvarying the width of the part or band 42. lVhere the shoes 14 and 18 aremounted on the pivots 24 and 26, I prefer to weld or' otherwise. secureseparate rings 54 to form extended bearings for the pivots.

The center shoe 16 is also provided with a hot-rolled section or thelike forming a band or cylindrical part 56 carrying the lining 58, butthe stiffening means in this case is in the form of a channel sectionmember `6() welded or riveted or otherwise secured to the inner face ofthe band 56 and whose sides 62 and 64 form a pair of spaced stiffeningparts. I prefer to spin over the inner edges of the side flanges 62 and64 to form short outwardly extending stiflening flanges 66. Where thepivot 24 engages the sides of the shoe 16, I prefer to secure separaterings 68 to the outersides of the parts 62 and 64 to form extended pivotbearings. I also may provide similar rings 68 for the pivot 26 and thepivot or anchor 20. It should be noted that the side ilanges 62 and 64project a considerable distance beyond the end of the outer part or band56 to form spaced arms offset within the curve of the shoe andpreferably mounted on the anchor 20.

While one illustrative embodiment has been describedin detail, it is notmy intention to limit the scope of the invention to that particularembodiment or otherwise than by the terms of the appended claims.

I claim:

1. A brake shoe comprising two stiflening flanges extended to form acylindrical section of fixed Width integral with the flanges, incombination With a lining-carrying band secured to the cylindricalsection and of different Width than said section.

2. A brake shoe comprising two spacedapart stiffening flanges extendedto form a connecting cylindrical section of fixed Width integral withthe flanges, in combination with a lining-carrying band secured to thecylindrical section, said flanges projecting beyond the end of the bandas a pair of pivot arms.

3. A brake shoe comprising, in combination7 a cylindrical band, and achannel-section part secured to said band and forming stiffening meanstherefor and having its sides extended beyond the end of said band toform a pair of projecting arms.

4. A brake shoe comprising7 in combination, a cylindrical band, and achannel-section part secured to said band and forming stiffening meanstherefor and having its sides extended beyond the end of said band toform a pair of projecting arms, said arms being provided with openingsat theirends to embrace a pivot and With openings near the end of theband for the pivot of a shoe overlapped thereby.

5. A brake shoe comprising a pair of flanges formed with alined openingsfor a pivot, and having separate rings secured to the sides of theflanges about the openings to form extended pivot bearings.

In testimony whereof, I have hereunto signed my name.

LUDGER ELIZ LA BRIE.

